The calculator is 100% correct.
Special thanks to Tipperhur (Team Details) and Bhala (Team Details) for the formula.
You can find the team's ID at the top of its profile page.

!!! Tutorial and notes:
* This tool helps you see the exact Q of each of your team's players.
* After a training or after playing a friendly you can press the 'Reload with new attributes' button. This will show you the gains and the Q changes, aswell as lost fitness.
* You can also save your current attributes, so you can reload them anytime, even after you close your computer. The load page will automatically show you the changes since the last save.